Machine for dressing revolving grinding wheels



April 2, 1935. H. F. ATKINS MACHINE FOR DRESSING REVOLVING GRINDING WHEELS Filed Aug. 25, 1934 4 Sheets-Sheet 1 derick R \NvaNTo & T?

Harvrg April 2, 1935.

H. F. ATKINS 1,996,396

v MACHINE FOR DRESSING REVOLVING GRINDING WHEELS File d Aug. 25, 1954 4 Sheets-Sheet 2 9 k ATTY:

DING WHEELS 4 Sheets-Sheet 3 H. F. ATKINS MACHINE FOR DRESSING REVOLVING GRIN F iled u l 25,;1934

' April 2, 1935.

nu K a A K d F 3 R S I I 7 WW Q. N Q I la! r 93 II M I I I I H hm m w 9 I I, 9V3

April 2, 1935. H. F. ATKINS 1,996,396

MACHINE FOR DRESSING REVOLVING GRINDING WHEELS Filed Aug. 25, 1934 4 Sheets-Sheet 4 Harri Freda/(ck ATMNS 13 IN vs NTQE,

QQATT Patented Apr. 2, 1935 AA UMTED Mommas. nsss.sme savou me writ rs Harry "Frederick Atkins; .Old :rimtbn,

. TBGtGIbQEQQg En an pplication Au ust. 1as4 -.s.e ia11 ierelat v In Great :Britain Aueust 29, 1933 4 Claims. i reprise-in f 'h inv on p i t e he eina te de scribed and c aimed emhina e Qt arts embo ied. in a m chine fo res n the eperat re face of a o vin indin whee sa d.

trolledhy th movement o e c-st lu a in t. stationa y. former of the exact shape t :whiqhthe Wheel is to be dressed.

he machi eaccording to the inventiona stationary frame'to rigidly support a fpr-mer.

first compound slide is mounted 111 911 the fr me adjacent the former, and carries a :fii' y tlfi. 1 mere incontact with said former. A second qq hQl-LDQ slide is also mounted :upon the tationary. and. carries i a dressing "tool. .The cslidablfi 1 ame bers of the .two compound slides preferably mere at rightangles to eachother. Between thea re compound slides a coupling means is -;arranged mounted in the frame, :to causesaid two 410119; pound slides-to move in unison, in proportionate relationship, from the. movement of the first compound slide governed-by the contact stylus against the former. 7

The foregoing combination of :parts in 131mg:

chine is, generally speaking, arranged horizontally, that is to say, to providea horizontal :ma:

chine with the first compound slide on :the

the frame and the secondcompoundslide helQW the frame; but both supportedon said irarnearrd with the coupling means worlring inhearingslpf the frame. 1

" -Also s'aidmac'hine may comprehend :its orne bination of parts means provided upon-the first compound slide for adjusting the relative 51 119.-

the two compound slides. V The invention may -also' embody 'two crank shafts and cranks as-part of the-means for couL- pling the two compound slidestocausethem-to move in unison in proportionate relationship.

.Thetwo compound slides need not be at angles to each other.

rightrne machine a ord n t the .ihventin and embodying the combination of parts hereinloefore stated and hereinafter claimed is representediby the accompanying sheets of drawings.

Ela v sa t an ver e sectiona Elia-.2 is a longitudinals ctional-v ew e1 onthe dotted. linesAtB.

Y sectipnal planet gonthe dotted" 1 ih s CuD.. v, I .i 5, A a d ta l in se ti nal a mi ar to Fi Bbut il ustrat ng a h rt o the ouplin .E i5 .isa hlen-e he the tylusa di erme j ind cates i h eqm e nd s id eh l e m undslidea 7 hihei v d wit fi'mre l el-hearin s 2 90 meuh ed m veilonei udihally i an ah i-. :et oha1 marin r by means vof int rp halls a s id :ihemher' Thi slid membe he :e ahsvers o Mn Whieh asid -mem 5 tre t IRQXQ irlee eh he e to the ,d reet enhimev ient o the s d m m: h r t hisrslide membe 's mesuhp ted 811 13 1 teiet qha l unonhee .theiside m per I 3- Thus the. sli e ,ihemb lts and 5; on t u ins henrst leempqund' lide mo as it nieee (next t e leesitudina dir o the maehihe hu ih'the othe di eeti at r ht an es the-s ide memb r '5 h lv ha v m n 'l he l dermemhe 5ea nie' -as lus T e d to be m ved i xebhtact with th e nteur .8 f ,a termed ig dl Sup o ted mie th ra 1 b heads t 1 Siaidlsl de 5 leerr e a rigid h rb of it a :l ih vihai med in it nd s aloneitudinalikekmay 1 L2 i9 7 theu pose l he hG Q ILBZI Q fiQ iWQ' 1 Y Mqun e hearings t3 fo m n a nt the stati ar Jea ie r! isi s ide J 4 .e'o hect d t the v rRisidly-hu-t iadiu tahlv harri d h n t u d sideeo st eislid 4 is h r ,5 forme wit a under-gr o ed? -.ine1.i ee t thedi eetionof move me t-o said that wa shown learlvin Fig. 4. e

slidehly en agin thi groove 1 is e -M ek .lt-v-earriedthv-acrankr 1119 'ofa' e z Wh e shait, S2 1 is ous d. er i a hear n e me in the frame I. At-.-;t, e;1ower end ofthe shaft 2. is e-cra kz g-iearryihe-aerahk i 2 gaging: a slide .hlOQk vzhvvhich ,isslidaloly mounted tran ver e Careers :25 efa ide me b 6 resented a tki i tien lly he n s e the m ehih isamejlsc.

slide F.

Rigidly but adjustably carried on the underside bearings of the machines frame I, the other end, of this shaft being formed withacrank 34 carrying a crank pin 35 to engage'aslide block 36 slidably mounted in a longitudinal groove 31 of a slide member 38 mounted anti-frictionallyin tour Sof the former 9 '(by'hand operation of the 30 bearings 39 of the slide member 26 to be movable in a transverse direction, this slide member 38 being the other slide member .offtl'ie second compound slide F.

The dressing tool 49 is a reduced shape replica of the stylus l and is carried by a holder 4| mounted within a boring of the slide member 38.

The revolving grinding wheel to be dressed is indicated at 42 and is protected by a guard 44 forming astationary part of the 'machines frame. 1 The operation of the machine, having regard to the position of the stylus in relationto the former as illustrated in Fig. 5, is as follows:

The movement of the stylus I along the conknob 59) is permitted by the'combined longitudinal and transverse movements of the'slide members 3 and 5, respectively, of thejfirst com;

pound slide E, that is to sayfif the stylus is moved from the position indicated in full lines in Fig. 5 to a position 60 indicated in dotted lines in this figure, the'moveinent 'of the stylus along the contour 8 of the former 9 is a 'com-. bined movement of the slide member 15' to the extent of the depth of thethread'and of the slide member 3 to the extent of'half the pitch'of the thread, so that'in this plane'of movement the stylus has a universal traverse in contact with the former. During the movement of the slide member 5 in one of its directions theykey !5, the slide M, the bar l6, and the groove H all move with it to thereby cause the shaft 2| to be rocked and the slide members 26, 28 to be moved in one direction, as shown in the drawings, at right angles. ,When'the slide member 5 is moved in its otherdirectionthe slide member 3 is moved with itand the key-way 12 in the bar II will slide idly over the key [5 so that no motion istransmitted to theslide l4. The bar 28 and groove 29 are carriedb'y the slide member 3 and therefore as said slidemoves the groove 29 is carried with it and will partly rotate the shaft 33 to thereby impart movement to the slide 38 in a direction at right angles to the direction in which the (crank shaft 2| movesit. The combined movement of the slide members 26 and 38 in the one direction andtlie movement of the slide member 38 inthe other direction causes the dressingtool 49 to'follow a path exactly the same as the path described by the stylus over the former but with a reduced amount of traverse dependent upon the inclination of the grooves Hand 29 and the throw of the cranks 29 and 22 and 32 and 34.[-- Separate means are providediorjvarying the angle of inclination of thegrooves l1 and 29 comprising for each adjustment' an internally screw threaded sleeve 45 'and 'a screw threaded pin 46 adapted to co-operate insuch a manner as to, in the one case, clamp-'theslide I4 tothe member 26 being a part of the second compound 7 bar l6 and in the other case clamp the slide member 3 to the bar 28. To allow the inclination of the groove l! to be altered quickly and accurately to another angle holes 4'! and 48 are provided in the slide l4 and holes 49 and 59 are provided in the bar, said holes being relatively positioned but by alignment of the holes 41 and 49 or-"48 and 59 different angles of inclination of the grooves I! are obtained and this inclination .fixed by the insertion into either pair of said aligned holes of a dowel peg 5! which can be removed. and applied by a tool applied to its curately to another angle holes 54 and 55 are provided in the'slide member 3 and a hole 53 is .provided in the bar 28. Said holes 54 and 55 are relatively positioned but by alignment of the holes 54 and 56 or- 55 and-56 and theinsertion of a dowel peg 5T difierent angles of inclination of the groove 29 are obtained. A bracket 58 constitutes the base of e the table I. I r To change the inclination of the grooves I1 and 29 the respectivedowel pegs are first-withdrawn, the respective clamping devices, such as 45 and 43, are loosened and then the bars l6 and 28, about the clamping devices as their pivots, arepartially rotated until the dowel pegs are inserted intothe newly aligned holes, after which the clamping devices are screwed up tightly to rigidly fix the bars I6, 28 to their respective slide and slide member.

7 The proportionately reduced relative movement between the stylus l and the dressing tool 40 may bevaried by'a means alternatively, or in addition, to the means hereinbefore described, consisting of varying the throw of any, .or allof the cranks29, 22,32 and 34, by providing a plurality of holes in the said cranks and by providing o'nrea'ch of the slide-blocks I8, 24, 30 and 33, a pivoting pin adapted to engage one of the.

holes in its associated'crank. e

-It' is to be understood that the proportionately reduced relative movement between the stylus I and the dressing tool 40 may be diiferent in the longitudinally and transverse directions, and this may be eifected by inclining the grooves l1 and29 to relativelyndifierent angles whilst maintaining the relative throw of the double cranks 20, 22 and 32, 34, the same, or by altering the relative throw of the double cranks 29, 22 and 32, '34, whilst maintaining the angles of the grooves Hand 29 the same.

V The dressing tool40 is illustrated as operating at right angles .to the stylus 1, but the machine may be arranged such that said dressing tool operates parallel to or at anyangle to said stylus. Having now described my invention, what I claim and desire to secure by Letters Patent is:

Machine for dressing the operative face of a revolving grinding-wheel comprising in combination a stationary frame, a former rigidly supported by theirame, a first compound slide supported by the frame, a first compound slide mounted upon the frame adjacentthe former and carrying a stylus to move in contact with the former, a second compound slide also mounted upon the frame and carrying a dressing tool, means coupling the two compound slides to cause them to move in unison in proportionate relationship, and means provided upon the first compound slide for adjusting the relative proportionate movements of the members of the second compound slide.

3. Machine for dressing the operative face of a revolving grinding wheel comprising in combination a stationary frame, a former rigidly supported by the frame, a first compound slide mounted on top of the frame adjacent the former and carrying a. stylus to move in contact with the former, a second compound slide also mounted below the frame and carrying a dressing tool, and means comprising two crank shafts and cranks supported in the frame for coupling the two compound slides to cause them to move in unison in proportionate relationship.

4. Machine for dressing the operative face of a revolving grinding wheel comprising, in combination a stationary frame, a former rigidly supported by the frame, a "first compound slide mounted-on top of the frame adjacent the former and carrying a stylus to move in contact with the former, a second compound slide also mounted below the frame andcarrying a dressing tool, means comprising two crank shafts and cranks supported in the frame for coupling the two compound slides to cause them to move in unison in proportionate relationship, and means provided upon the first compound slide for adjusting,

through the crank shafts and cranks, the relative proportionate movements of the members of the second compound slide.

HARRY FREDERICK ATKINS. 20 

